Centrifugal pump



P. OSTENBERG.

CENTRIFUGAL PUMP.

APPLICATION FILED IAN-9,1920.

1,387,660, Patented Aug. 16, 1921.

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OENTRIFUGAL PUMP.

Specification of Letters Patent.

Patented Aug. 16, 1921.

Application filed January 9, 1920. Serial No. 350,347.

T 0 all whom it may concern Be it known that I, PONTUS Osrnxnnao, acitizen of the United States, and resident of San Jose, in the county ofSanta Clara and State of California, have invented certain new anduseful Improvements in Centrifugal Pumps, of which the following is aspecification.

My invention relates particularly to the bowlstructure of centrifugalpumps.

Centrifugal pump bowls as heretofore formed require the use of cores incasting and are somewhat difiicult to properly machine and finish tosecure the best results in their practical application.

It is the object of my invention to provide a pump bowl that will besimple in form, that can be cast without the use of a core, in which theseveral parts are easily accessible for finishing. A further object isto provide a bowl of the character indicated in which the severalchambers are easily assembled and connected to the pump casings.

In the drawing:

Figure 1 is a vertical cross-section through one-half of an assembledcentrifugal pump embodying my invention.

Fig. 2 isa perspective view of one of the bowls shown in section in Fig.1, part being broken away.

Fig. 3 is a detail sectional view through another embodiment of myinvention.

Fig; 4 is a vertical section through one half of a one stage pumpembodying my invention.

Referring more particularly to the drawing, 1 indicates a pump shaftmounted in bearing 2 and carrying a plurality of runners 3 asparticularly set forth in my Patout No. 1,283,879, dated Nov. 5, 1918,the bearing 2 being a part of the main bearing bowl & and connectedthereto by webs A portion of a suction casing is indicated at 6 and aportion of a discharge casing at 7 the latter being screwed into the topof bearing bowl at as shown at 8. The particular type of bowl formingthe subject matter of this invention is shown clearly at 9.

Eachbowl 9 comprises a cylindrical wall of suitable size threaded uponone inner edge as at 10, its upper edge being carried inwardly towardthe axis of the bowl as at 11 to form a discharge opening 12 throughwhich shaft 1 and the pumpedwater passes. \Vithin the shoulder 13 formedas shown and described are positioned a plurality of vanes 14,, arrangedto receive water discharged into bowl 9 and divert it upwardly andinwardly to discharge opening 12. the surface 15 being properly curvedfor this purpose.

On the outer surface of bowl 9, concentrlc with opening 12 and somewhatsmaller 111 diameter than bowl 9, is formed an annular boss 16 threadedon its outer surface as at 17 and sloping inwardly toward openmg 12 asat 18 and forming a shoulder 19 in which the lower portion of runner 3cperates. On ring or boss 16 are formed a plurality of diffusion vanes20 so proportioned as to closely approach the lower edges of vanes 14when placed in position and suitably proportioned and formed to receivewater directly from runners 3 and divert the same upwardly to vanes 14.

In assembling this form of my invention it is only necessary to attachas many bowls together as required by engaging the threaded portion 1701one bowl with the threaded discharge bowl 1, and the threaded portion 10of the same bowl with the threaded portion 17 of the next lower bowl Thesuccessive bowls are positioned by threading into one another asdescribed until the last bowl is reached, whereupon a bottom member 21is screwed into position on said last mentioned bowl. This terminalmember'21 is formed with boss 16, threaded portion 17, surface 18,shoulder 19 and vanes 20, but instead of having a bowl portion 9 it isprovided with flange 22 projecting downwardly from the inner edge offlange 11 as shown in Fig. 1, and is threaded" as at 23 to engagethreaded suction casing 6 as at 24.

From the above description it may be seen that each bowl is a simpleopen casting that may be quickly assembled in any required numberaccording to the number of runners to be used.

In another form of this invention as shown in Fig. 3 the vanes 1.4 areprovided with a ring 25 extending over the upper surface of runner 3 tothe hub 3 thereof, this construction effectually preventing friction ofthe rising water upon the rotating top portion of runner 3. The objectis of course to pass the rising water through opening 12 with asubstantially vertical movement and to eliminate as much as practicablethe rotary motion imparted thereto by the rotating parts of runner 3.

The runners 3 are preferably made with a hub 3 extending upwardly anddownwardly from a flange 26 to engage the ends of the hubs of therunners positioned above and below, and the runner blades 27 depend fromflange 26 and carry a ring 28 adapted to rotate freely in shoulder 19and having a central opening of substantially the same diameter as thecentral opening 12 of the bowl with which it is to be used.

.In Fig. 4 it is shown that this construction is 'as readily adapted foruse with a single runner as with a plurality of runners.

It is, understood that I do not wish to confine myself to the specificforms of the invention set forth in the above specification but toinclude all variations in form, proportions, construction and methods.of assembly and operation that may be included in the appended claims.It should be pointed out that the construction herein set forth providesan exterior pump surface that is devoid of material inequalities therebyfacilitating its placing in and removal from a 'of saidyanes beingformed integrally with I claim 1 1. In acentrifugal pump, a bowlcomprisingacylindrical wall section adapted to be attached to upper andlower sections, and have a runner mounted therein, a flange arranged onsaid wall section adjacent to and within one end" thereof andextending-within the radius of the runner mounted therein, a diffusionvane arranged on one side of said flange andextending within the radiusof the said runner, and a diffusion vane arranged on the opposite sideof said flange and extending inwardly to a point adjacent the outerperimeter of the said runner, both said flange.

2. Ina centrifugal pump, a bowl comprlsing a cylindrical wall sectionadapted to be i attached to upper and lower sections, and

have a runner mounted therein, a flange arranged on said wall sectionadjacent to and within one end thereof and extending within the radiusof the runner mounted therein, a diffusion vane arranged on the lowerside of said flange and extending within the radius of the said runner,and a diffusion vane arranged on the upper side of said flange andextending inwardly to a point adjacent the outer perimeter of the saidrunner, both ofsaid vane-s being formed integrally with said flange. a

1 In a centrlfugal pump, a bowl comprismg a plate having a centralopening therein i for the discharge of water therethrough, an

annular andinteriorly threaded flange extending from one side thereof atits outer edge, a diffusion vane arranged in the shoulder between saidplate and said flange, and

a 1 an annular and. externally threaded boss of less diameter than saidplate extending from the other side thereof.

for the discharge of water'therethrough, an

annular and interiorly threaded flange extending from one side thereofat its outer edge, a diffusion vane arranged in the shoulder betweensaid plate and said flange, an annular and externally threaded boss ofless diameter than said plate extending from the. other side thereofsaid boss having its outer surface beveled inwardly, and a diffusionvane arranged on said beveled surface.

6. A centrifugal pump including a shaft, a runner mounted thereonincluding a plurality of depending vanes supporting an annular plateprovided with a central opening for the passage of waterztherethrough,and a bowl having afshoulder formed thereinto receive said plate and adischarge opening of substantially the same diameter as theopening insaid'plate, said bowl having an exteriorly threaded flange to engage theinteriorly, threaded portion of the member having also a diffusion vanearranged'thereon to direct water, into said discharge opening and adiffusion vane arranged thereon to receive the water passed through saiddlsrharge opening and sald runner.

7.- A centrifugal pump including a shaft,

a runner mounted thereon, a bearing for said shaft adjacent said runner,an interiorly threaded bowl formed integrally with saidbearing, andaobowl operatively mounted with relation to said runner, said bowlhaving an exteriorly threaded boss adapted to engage saidinteriorly-threaded first mentioned bowl, an interiorly threaded flangeadapted to, engage .the -exteriorly threaded portion: ofthe adjacentmember when assembled, an inner discharge opening communicating with theinner portion of said runner, a diffusion vane arranged therein todischarge water through said discharge opening, thereon to receivewater'discharged by said runner. y

8. A centrifugal pump including a shaft, a plurality of: runnersprovided'with reand a diffusion vane arranged ceiving chambers mountedthereon, a shaft bearing adjacent the uppermost runner, a

bearing bowl supporting said bearing and spaced a distance therefrom andthreaded to engage a threaded discharge casing section and a bowl, and aplurality of bowls of substantially the same exterior diameter as thelower end of said bearing bowl, each bowl having oppositely extendingthreaded flanges to engage the threaded portions of the bowls adjacentthereto, a central opening alining with said runner chambers, aplurality of diffusion vanes communicating with said opening, and aplurality of difl'usion vanes arranged to receive water from saidrunners, and a bottom mem-' ber threaded to engage the adjacent threadedflange of the bottom bowl, said bottom member also being threaded toengage a threaded suction casing section, having a central openingtherein communicating with the receiving chamber of the adjacent runnerand having a plurality of diffusion vanes arranged thereon to receivewater from said runner.

PONTUS OSTENBERG.

